csmstr - Omega Engineering

MODULE CONFIGURATION
CSSG – STRAIN GAGE INPUT PID MODULE PROGRAMMING
• The Value property is the point at which the alarm will turn on. The alarm values
are entered in the same units of measure as those used to scale the variable
chosen in the Assignment property.
• The Hysteresis value separates the on and off points of the alarm ie. a high acting
alarm programmed to turn on at 500 with a Hysteresis of 10, will turn off when
the PV falls below 490.
• The Latching property dictates how the alarm behaves once activated. See the
Alarm Behavior Chart below for more information.
• The Standby property provides a means of preventing so called nuisance alarms
during power up. See the Alarm Behavior Chart below for more information.
ALARM BEHAVIOR CHART
LATCHING STANDBY ALARM BEHAVIOR
Alarm automatically turns on and off as the measured value crosses in and out
of the alarm region.
The AlarmAccept bit disables alarm, regardless of the state of the process. If the
alarm condition exists, and the bit is written to a “0”, the alarm activates.
Once activated, the alarm stays active until accepted.
If the alarm condition no longer exists, writing the Alarm Accept bit to “1”
resets the alarm condition.
As long as the Alarm Accept bit is “1”, the alarm automatically turns on and off
as the measured value crosses in and out of the alarm region.
Alarm automatically turns on and off as the measured value crosses in and out
of the alarm region.
The alarm is automatically disabled when a setpoint change occurs, or when the
module is first powered up. This prevents nuisance alarms from occurring. The
alarm remains disabled until the process enters a non-alarm state. The next time
the measured value enters an alarm condition, the alarm will activate accordingly.
The AlarmAccept bit disables the alarm, regardless of state. If the alarm
condition exists, and the bit is written to a “0”, the alarm activates.
Once activated, the alarm stays active until accepted.
The alarm is automatically disabled when a setpoint change occurs, or when the
module is first powered up. This prevents nuisance alarms from occurring. The
alarm remains disabled until the process enters a non-alarm state. The next time
the measured value enters an alarm condition, the alarm will activate accordingly.
Momentarily writing the AlarmAccept bit to “1” turns off an active alarm. If the
alarm condition still exists, the alarm remains off and is placed into standby
mode. That is, the alarm will remain off until the alarm condition goes away,
and is then reentered.
If the AlarmAccept bit remains a “1”, the alarm is disabled, and will not function.
REVISION 6 PAGE 41